How to Read Co2 Regulator for Grow Room
Grow room and indoor greenhouse growers online agree that for optimum plant growth, you should enrich the air around the plants with carbon dioxide (CO2) during the daylight growth wheel. Photosynthesis (plant growth) requires calorie-free, nutrients, h2o and CO2.
If yous give your plants the perfect corporeality of light, water, and nutrients, the limiting factor in their growth will be the amount of CO2 in the air.
While normal outdoor CO2 levels (about 400ppm) will attain normal plant growth, doubling or tripling the CO2 levels tin can increase the growth rate. However, above 2,000ppm CO2 becomes toxic to plants, and in a higher place v,000ppm CO2 becomes potentially harmful to people. Nearly experts agree that 1,500 ppm is the maximum CO2 level for maximum plant growth, although any CO2 level between 1,000ppm and ane,500ppm will produce profoundly improved results.
CO2 Controller Setup
CO2 enrichment can easily exist achieved with CO2 controllers and digital tank regulators. In this example, we will use the Day/Dark CO2 Monitor and Controller for Greenhouses combined with our CO2 Tank Regulator.
The Solar day/Nighttime CO2 Monitor and Controller is ready past default to 1,000ppm CO2. You lot tin can change this in the setup. CO2 controllers will automatically stop powering the tank regulator during the nighttime menses. Mount the controller ii-three feet higher up the floor of the grow room, or just above the canopy of institute tops as they grow taller.
Tank Regulator Setup
Connect one end of the CO2 tank regulator to a 20lb. or 50lb. CO2 tank, and the other finish to several feet of one/8" flexible tubing with holes drilled in the length of it that is suspended above the plants. You lot can buy pre-drilled tubing at many abound-room suppliers online. Alternatively, you can put the stop of the tubing behind a fan high higher up the plants. CO2 is heavier than air, so it will menstruum down to the plants.
Turn on the gas at the tank. Plug the regulator into the Day/Night CO2 Monitor and Controller, and plug the controller into a grounded 120VAC wall outlet. Because the CO2 level in your grow room will exist less than i,000ppm, the regulator will turn on instantly.
Set the CO2 menstruum control to approximately 5 SCFH (Standard Cubic Feet per Hour), which is 0.08 cubic feet per minute (5/sixty).
CO2 Calculator
To calculate the amount of CO2 you demand, yous'll need to calculate the size of the grow room. For instance, if you have a 8x8x7 foot grow room, you would demand to cover 448 cubic feet (8x8x7=448). To compute the amount of CO2 required to raise the level to i,000ppm utilise this equation:
Width ten length ten meridian x desired CO2 level in parts per meg.
And then in our case, we take 8x8x7x0.001 = 0.448 cubic anxiety of CO2 needed to raise the level inside the grow room to 1,000ppm CO2.
We can roughly summate how long the regulator will be turned on with this formula:
CO2 needed in cu.ft. / flow charge per unit per infinitesimal
Since we need 0.448 cu.ft and the regulator is set at 0.08 cu.ft. per infinitesimal, the CO2 Controller will activate the solenoid on the regulator for approximately 5.6 minutes to raise the CO2 level to 1,000ppm (0.448/0.08).
How long will a CO2 Tank Last?
A pound of liquid CO2 in a tank contains eight.741 cubic feet of gas, and then a 20lb. cylinder would concord 175 cubic feet CO2, and a 5lb. cylinder would hold approximately 44 cubic feet CO2.
A 100% air exchange every 2 hours (air leakage through cracks and doors) is normal in most grow rooms and tight greenhouses, and then y'all will employ .448 cu.ft. of CO2 every 2 hours, or about .224 cu.ft per hr (.448/2). Using .224 cubic anxiety per hour and eighteen hours of daylight, you would expect to use about four cubic feet per day (.224x18). This means the 20lb. tank should theoretically last 44 days (175/four), while the 5lb. tank will last about 11 days (44/4). These estimates do not accept into account plant uptake of CO2, opening doors or curtains, or other opportunities for CO2 to escape and require replenishment.
CO2 Calculation Tips
1. Experts disagree virtually the optimum level of CO2 for establish growth. Y'all can detect arguments for 800ppm, 1,000ppm, 1,200ppm and 1,500ppm. We recommend starting at 1,000ppm, so adjusting your CO2 levels over time with experience.CO2 levels below 400ppm and above 1,500ppm volition reduce plant growth.
2. Experts exercise agree that raising CO2 alone volition non guarantee plant growth. Proper soil, nutrients, watering, light and cleanliness must exist achieved in combination with enhanced CO2 levels for optimum results.
3. A fan within the grow area pointed at the end of a length of tubing from the regulator volition broadcast the CO2 in the air for maximum benefit. Otherwise, you tin can connect the regulator to a length of tubing with pivot-holes strung effectually the tiptop of the grow room so that the CO2 will "drib" on the plants (CO2 is heavier than air).
4. If you are growing indoors, purchase an inexpensive timer to command your day/night light menstruation. Never run CO2 during the nighttime period.
5. Note the temperature on the Day/Dark CO2 Monitor and Controller. Temperatures above 27°C (80°F) over time can result in elongated stems and lower yields of mature plants.
Source: https://www.co2meter.com/blogs/news/41003521-co2-calculator-for-grow-room-or-indoor-greenhouse#:~:text=To%20compute%20the%20amount%20of,room%20to%201%2C000ppm%20CO2.
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